Let's divide 42631563 by 648
We're looking to find how many times 648 goes into 42631563.

On to step 1:
The number 648 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 648

On to step 2:
When dividing 42 by 648, we get 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (6) from the dividend, attach it to 42 and continue: 426 / 648

Step 3:
The number 648 fits into 426 0 times, leaving a remainder of 426.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 426 leaves us with 426.
Bring next digit (3) of the dividend behind the 426 and repeat the process: 4263 / 648

Moving on to step 4:
The number 648 fits into 4263 6 times, leaving a remainder of 375.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 3888 from 4263 and we're left with 375.
Take the next digit (1) from the dividend and append it to 375, then repeat: 3751 / 648

Moving on to step 5:
If we divide 3751 by 648, we get 5 and a remainder of 511.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
If we take 3240 away from 3751, we end up with 511.
Fetch the next digit (5) from the dividend, attach it to 511 and continue: 5115 / 648

Moving on to step 6:
The number 648 fits into 5115 7 times, leaving a remainder of 579.
The number 7 becomes the next digit in our result. 
Result so far: 657.0
The remainder is 579 after subtracting 4536 from 5115.
Append the next digit (6) from the dividend to 579 and continue with: 5796 / 648

Going ahead to step 7:
5796 divided by 648 is 8 with a remainder of 612.
Write down 8 as next digit of the result. 
Result so far: 6578.0
If we take 5184 away from 5796, we end up with 612.
Include the next digit (3) from the dividend after 612, then repeat: 6123 / 648

Going ahead to step 8:
The number 648 fits into 6123 9 times, leaving a remainder of 291.
Use 9 as the next digit of our solution. 
Result so far: 65789.0
Deduct 5832 from 6123 and we're left with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Let's proceed to step 9:
When dividing 2910 by 648, we get 4 with a remainder of 318.
Record the quotient 4 as the next digit in the result. 
Result so far: 65789.4
Subtracting 2592 from 2910 leaves us with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Moving on to step 10:
648 goes into 3180 4 times with a remainder of 588.
Put 4 as the next digit of the answer. 
Result so far: 65789.44
Deduct 2592 from 3180 and we're left with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Our division results in 65789.44 with a remaining 0.588.